Does anyone have a clue as to what this is?

[authenticantiques]

Hi All 🙂

Found this in a flea market today and it has me a little stumped.

Overall it appears to be an Antique brass pin brooch, 

but,  the center looks like "dried up chewing gum" to me lol !

Not granite or stone, not quartz, its not cold...some kind of weird resin maybe?

Would anyone have a clue as to what the center of this Antique pin brooch is?

Thanks! 🙂

[reallynicestamps]

It could be celluloid, pretending to be a cairngorm perhaps?

Pink swirl sounds pretty accurate and attractive.

[bestchoicebrand]

If it feels like plastic, I would say - Acrylic

[reallynicestamps]

bestcheapfast-- but given the apparent age, the much older celluloid is a strong possibility.